Vegetation and climate history inferred from a Qinghai Crater Lake pollen record from Tengchong, southwestern China
Vegetation and climate history inferred from a Qinghai Crater Lake pollen record from Tengchong, southwestern China
复制标题
DOI：
10.1016/j.palaeo.2016.07.017
复制
发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
Yiping Yang;Hucai Zhang;Fengqin Chang;H. Meng;Anding Pan;Zhuo Zheng;R. Xiang
中科院分区：
文献类型：
--
作者：
Yiping Yang;Hucai Zhang;Fengqin Chang;H. Meng;Anding Pan;Zhuo Zheng;R. Xiang
通过对滇西青海火山口湖514 cm长的连续岩心剖面的孢粉学研究，重建了15.8 cal kyr BP至今的区域植被和气候。结果表明，在15.8 ~ 12.8calkyr BP，本区为落叶阔叶林，以落叶栎为主，气候偏冷干燥。12.8 ~ 8.3 cal kyr BP，植被仍以落叶阔叶林为主，但锥栗/石栎突然增加，落叶栎和赤杨略有下降，反映了温度和湿度的逐渐增加。在8.3-4.6 cal kyr BP期间，混合落叶林变得更加多样和密集，嗜热和嗜湿物种扩展到最大程度，这意味着温暖而潮湿的气候。4.6 ~ 0.5 cal kyr BP，植被由以赤杨属为主的落叶阔叶混交林取代，万年青阔叶林后退，气候凉爽，稍干。在0.5 cal kyr BP之后，植被变得更少多样性和更开放，但万年青阔叶树的蔓延明显增加，这表明气候变得更加温暖和干燥。近几十年来，人类活动导致了该湖盆周围Alnus和Pinus的大量增加。具体来说，我们的结论是，温暖和潮湿的气候检测之间的8.3和4.6卡尔凯尔BP可能发生在响应高海面温度和高海平面在孟加拉湾存在的时间。
A palynological investigation of a 514 cm long continuous core section from Qinghai Crater Lake, western Yunnan Province, southwestern China, was performed in order to reconstruct regional vegetation and climate from 15.8 cal kyr BP to the present. The results show that the area was covered with deciduous broadleaved forest dominated by deciduousQuercusbetween 15.8 and 12.8 cal kyr BP, suggesting slightly cold and dry conditions. From 12.8 to 8.3 cal kyr BP, the vegetation continued to be dominated by deciduous broadleaved forest, but there was also a sudden increase inCastanopsis/Lithocarpusand a slight drop in deciduousQuercusandAlnus, reflecting a gradual increase in both temperature and humidity. During the period 8.3–4.6 cal kyr BP, the mixed deciduous forests became more diverse and dense, with thermophilous and hygrophilous species expanding to their maximum extents, implying a warm and rather humid climate. From 4.6 to 0.5 cal kyr BP, the vegetation was succeeded by open mixed deciduous forest dominated byAlnus, with a retreating evergreen broadleaved forest, indicating a cool and slightly dry climate. After 0.5 cal kyr BP, the vegetation became less diverse and more open, but evergreen broadleaved trees increased their spread markedly, suggesting that the climate had become warmer and drier. In recent decades, human activity resulted in a large increase inAlnusandPinusaround this lake basin. Specifically, we concluded that the warm and moist climate detected between 8.3 and 4.6 cal kyr BP may have occurred in response to the high sea surface temperatures and high sea levels in the Bay of Bengal existent at that time.